Barbell Shrugged

Dr. Eric Trexler returns to Barbell Shrugged to break down one of the most misunderstood subjects in fitness: how the body adapts to dieting, exercise, and energy restriction. Eric, a Duke University researcher with a PhD in Human Movement Science, joins Doug Larson, Dr. Mike Lane, and Coach Travis Mash to explain the constrained energy expenditure model, why cardio does not always produce the linear calorie burn people expect, and why the context of your diet matters. They cover metabolic adaptation, under-fueling in endurance and weight-class athletes, and why the body creates more friction as you get leaner or try to train hard on a fixed calorie budget.
The crew also gets practical about fat-loss plateaus, "weight-loss resistance," diet breaks, refeeds, and reverse dieting. Eric explains why tracking errors often masquerade as metabolic problems, why getting extremely lean carries real performance and lifestyle tradeoffs, and why slower timelines are often the smarter move. He also shares what the research actually says about using refeeds and diet breaks to preserve metabolism and why aggressively beginning recovery after a hard diet may be more effective than dragging out a reverse diet. Whether you are cutting for a weight-class sport, chasing a physique goal, or simply trying to lose body fat without losing your mind, this episode will help you make better decisions with your nutrition and training.
Links:
Doug Larson on Instagram
Coach Travis Mash on Instagram

In this episode, OG Barbell Shrugged crew member Alex Maclin joins Doug Larson, Coach Travis Mash, and Dr. Mike Lane to talk nutrition for jiu-jitsu, combat sports, and high-performance training. Alex shares his evolution from overweight beginner to Olympic weightlifter, nutrition coach, and four-stripe brown belt, explaining how his personal nutrition shifted from fat loss to strength, aesthetics, and now athletic performance and recovery.
The crew breaks down practical fueling strategies for grapplers, including why total calories come first, why carbohydrates are king for high-intensity scrambles, and how protein, hydration, sodium, and nutrient timing all affect recovery and performance. Alex explains how to eat before training, what to use during longer or hotter sessions, why tournament-day nutrition must account for adrenaline and digestion, and how caffeine can help or hurt depending on arousal. Whether you train jiu-jitsu, CrossFit, weightlifting, or just want to perform better, this episode gives you a simple framework for eating like an athlete.
Links:
Doug Larson on Instagram
Coach Travis Mash on Instagram

In this episode, Doug Larson, Dr. Mike Lane, and Coach Travis Mash break down the real-world science of training for aesthetics: getting leaner, building muscle, and looking better without losing sight of performance, health, and longevity. Mike opens with a wild DEXA scan story about breast implants and body composition testing, explaining how implants can skew lean mass and bone density numbers. The takeaway is simple: body composition tools are useful, but only when you understand what they are actually measuring.
The crew then moves into the big rocks of physique change: nutrition, training volume, cardio, consistency, and choosing a style of training you can actually sustain. Travis shares how endurance work, reduced alcohol, better hydration, and family-wide nutrition habits helped him get leaner, while Doug and Mike explain why diet is usually the fastest lever for fat loss and lifting is the signal that helps preserve or build muscle. Whether you love bodybuilding, powerlifting, CrossFit, martial arts, climbing, or just want to look good and feel capable, the message is clear: train most days, eat mostly whole foods, and build habits you can repeat for years.
Links:
Doug Larson on Instagram
Coach Travis Mash on Instagram

For years, one of the biggest criticisms of CrossFit has been that, Given every workout is different, it's difficult to measure and track training stress in a meaningful way. Dr. Jerry Mangine joins Doug Larson, Travis Mash, and Mike Lane to discuss a decade of research aimed at solving that problem. Jerry breaks down how his team analyzed every CrossFit Open workout ever performed, developed equations to quantify workload across different movements, and created a system for classifying workouts based on total work performed and the rate at which athletes complete it. The conversation explores why some workouts produce specific adaptations, how coaches can better manage training stress, and what the future of CrossFit programming might look like when workload can finally be measured objectively.
 
The discussion expands into broader athletic performance, including the impact of body type on CrossFit success, critical power testing, VO2 max, lactate tolerance, gymnastics versus weightlifting backgrounds, and how AI may soon automate performance analysis across sports. Jerry also shares his vision as founding director of Kennesaw State's new Human Sport Performance and Well-Being Research Center, where researchers are developing new technologies to help athletes and coaches make smarter decisions. Whether you're a CrossFit athlete, strength coach, sport scientist, or simply interested in how performance is measured and improved, this episode offers a fascinating look at where athletic monitoring and training optimization are headed next.
Links:
Doug Larson on Instagram
Coach Travis Mash on Instagram

Peptides have exploded in popularity over the last few years, but separating legitimate science from marketing hype has become increasingly difficult. In this episode, Dr. Kyle Gillett joins Doug Larson, Dr. Mike Lane, and Coach Travis Mash for a deep dive into the world of peptides, growth hormone secretagogues, GLP-1 medications, and emerging therapies that may shape the future of performance, recovery, body composition, and longevity. They unpack what peptides actually are, which compounds have meaningful clinical research behind them, and where caution is still warranted, especially when it comes to growth factors, angiogenesis, and potential cancer-related concerns.
The conversation covers BPC-157, TB-500, Tesamorelin, Retatrutide, Selank, PT-141, myostatin inhibitors, mitochondrial peptides, and the next generation of obesity and metabolic health drugs. Along the way, the group explores practical questions athletes and health-conscious individuals are asking every day: Can peptides help recovery? Are there compounds that improve cognition or libido? What are the tradeoffs of GLP-1 medications? And how close are we to drugs that can meaningfully increase muscle mass the way GLP-1s improve fat loss? Whether you're curious about performance enhancement, injury recovery, healthy aging, or simply trying to understand what all the peptide buzz is about, this episode provides a balanced, practical look at one of the fastest-moving areas in modern health and performance.
Links:
Doug Larson on Instagram
Coach Travis Mash on Instagram